Fritillary weevil

The Fritillary weevil (Ceutorhynchus fritillariae) is a specialized insect pest belonging to the Curculionidae family, within the order Coleoptera. This weevil is specifically adapted to feed on plants of the Fritillaria genus, making it a significant threat to decorative bulbous flowers.

The host range is primarily limited to various species of Fritillaria, such as Fritillaria imperialis. The pest attacks both the vegetative and reproductive parts of the plant, often causing irreversible structural damage to the stems and developing flower spikes during the early growing season.

The biological cycle is synchronized with the emergence of host plants in spring. Adult weevils overwinter in the soil or under debris, emerging as temperatures rise to feed on young foliage. Following mating, females deposit eggs into the plant tissues, where larvae eventually develop by tunneling into the stems.

Damage is characterized by visible puncture marks on the leaves and internal hollowing of stems caused by larval feeding. This disruption of nutrient flow leads to stunted growth, wilting of flower buds, and in severe infestations, the complete collapse of the plant shoot.

Effective pest management strategies include the following measures:

• Regular field monitoring during the spring growth phase to detect early signs of feeding.
• Manual removal and destruction of infested stems to reduce larval populations.
• Application of approved insecticides when adult activity is at its peak.
• Implementation of garden sanitation, including the removal of debris where adults hibernate.
• Soil cultivation to disrupt the life cycle of pupating insects.